Benchmark Results: Energy Consumption (Idle/Load)
The FX-8150 can only reliably achieve higher clock rates when we apply more voltage to it. The result is better performance in the application benchmarks, but with the consequence of higher power consumption as frequency goes up. At idle, the differences are small, and range from 73 to 81 watts, which think is reasonable for an "eight-core" CPU.
Loaded up with benchmark applications, the differences in power consumption are much more pronounced. Up to about 4.0 GHz, the wattage increases only moderately. But from 4.5 GHz upwards, the power consumption rises dramatically, and any notion of power efficiency has to be abandoned.
Sandybridges=king of the hill(price to performance)
Bulldozer=budget cpu with multitasking capabilities.
Although I appreciate the work done on this article...
Nothing to see here folks, move along...
As for my own efficiency testing, I achieved 1.375V (cpu z), 4.4Ghz out of my 8120 with ease. I upped the NB to 1.115v (+.015V)wich added more stability and clocked the NB to 2600 to match HTT, wich brought another 1gb/s on sandra's memory test. All without disabling C1E or C3 states.
Would be nice to see some followups with memory testing, BD responds to fast speeds. Hard to read since its in a different language but the graphs are easy enough to see
sad to see amd's claims about efficiency turn out to be (much) less than accurate.
some people are definitely gonna complain about the ram used (ddr3 1333) and windows 8 or lack of highly threaded benchmarks like truecrypt encryption or pov ray tracing (as if those are always used by regular users lol) and stuff.
undervolting does look promising...but it doesn't seem to make any difference compared to sandy bridge systems. worse, bulldozer needs voltage increase to get more clockspeed.. i guess it will be more evident in fx 4100 and 6100 where substantial core voltage increase is necessary to get stock sandy bridge level performance out of them. that's just disappointing.
But if you ask me, this is a "defensive" chip in the processor wars. And no war has been won playing defense.
Meaning this war is a TOTAL loss to AMD... SADLY... AMD - ABSURDLY MORONIC DEVICES.